Merge branch 'hotfix/display-text-crash' into hotfix/2.11.2

Signal/src/ViewControllers/InboxTableViewCell.m

@@ -98,16 +98,20 @@ NS_ASSUME_NONNULL_BEGIN
                                                                                                 : [UIColor lightGrayColor]),
                                                               }]];
         }
-        [snippetText appendAttributedString:[[NSAttributedString alloc] initWithString:[[DisplayableTextFilter new] displayableText:thread.lastMessageLabel]
+        NSString *displayableText = [[DisplayableTextFilter new] displayableText:thread.lastMessageLabel];
+        if (displayableText) {
+            [snippetText appendAttributedString:[[NSAttributedString alloc]
+                                                    initWithString:displayableText
                                                         attributes:@{
                                                             NSFontAttributeName : (thread.hasUnreadMessages
                                                                     ? [UIFont ows_mediumFontWithSize:12]
                                                                     : [UIFont ows_regularFontWithSize:12]),
-                                                                                         NSForegroundColorAttributeName : (thread.hasUnreadMessages
-                                                                                                                           ? [UIColor ows_blackColor]
+                                                            NSForegroundColorAttributeName :
+                                                                (thread.hasUnreadMessages ? [UIColor ows_blackColor]
                                                                                           : [UIColor lightGrayColor]),
                                                         }]];
         }
+    }
 
     NSAttributedString *attributedDate = [self dateAttributedString:thread.lastMessageDate];
     NSUInteger unreadCount = [[TSMessagesManager sharedManager] unreadMessagesInThread:thread];